Swaging-roll.



rammed Ap r. 30, mm.

8. TRETHEWEY; SWAGING ROLL.

(Applicniop filedjuly 6, 1900.)

rrrcn.

ATEN

SAMUEL TRETI-IEWEY, OF PITTSBURG, PENNSYLVANIA.

SWAGlNG-ROLL.

SPECIFICATION forming part Of Letters Patent No. 673,145, dated April 30, 1901.

Application filed July 6, 1900. serial No. 22,679. lNo model.)

State of Pennsylvania, have invented ce'rtainj new and useful Improvements in Swaging- Rolls, of which the following is a specification.

Referring to the drawings, which make part of the specification, Figure 1 is an elevation of a pair of rolls, showing my improvement. Fig. 2 is an elevation of a roll adapted to be fitted with my improvement. Fig. 3 is a sectional view along the line III III in Fig. 1, and Fig. 4 is a perspective of my improved form of key.

My invention,briefiy stated,consists in certain new and useful improvements in that form of swaging-rolls in which swage and rollbody are made separate and the swage fixed to the roll-body by mechanical means. A great drawback experienced in the use of this type of roll has been the difiiculty in fixing the swage to the roll-body so as to prevent and overcome the tendency on the part of the swage to turn or follow around the roll. This I effect by providing the bottom of the recess with an angular bearing-surface, against which the swage is held snugly by means of the angular sides of the recess and swage anda key. My key is made with a lip or projection on both sides registering with channels in both recess-wall and swage, thus fixing the key firmly in position and providing a secure method of holding the swage in place.

The following is a detailed description of my invention, reference being had to the drawings:

1 1 are rolls. 2 2 are the journals thereof. 3 3 are recesses cut in said rolls at one side of the centers thereof. Said recesses are provided with sides 4 4., inclined inwardly, and

on one side of each of said recesses and ex-' tending the full length thereof is key-seat 5, whose inner side is inclined inwardly at a greater angle than the side of the recess, which key-seat is also slightly tapered longitudinally, as usual. Recess 3 is not cut down as far as the center of the roll by some distance, so that the roll is not weakened by the loss of the metal removed, and the bottom of said recess is cut away at an angle at its extremities 3 3*, as shown in Fig. 3, to gain additional firmness in setting the swage, as will be explained below. The swage 6 is, roughly speaking, semicircular in shape, with swaging-face 7. The sides of said swage 6 areinclined to fit the walls of recess 3, into which recess said swage is fitted. Along one of the side surfaces of swage 6 is cut channel 8, and a like channel 9 is out along the side surface of key-seat 5.

10 is a key having one of its surfaces inclined at an angle corresponding to the inclination of the side of swage 6, while the other side of said key corresponds to the inclination of the side of the key-seat 5 and being also slightly tapered longitudinally to fit key-seat 5. 11 11 are lips or projections on the sides of said key and integral therewith, which engage channels 8 and 9. It will thus be readily seen that any tendency on the part of swage 6 to rise in recess 3 would likewise tend to force key 10 tighter in its seat, and

thus enable it more firmly to hold the swage.

in position. Swage 6 at its extremities 12 12 is provided with angular prolongations adapted to fit snugly against the angular bearing surfaces described above at the extremities of recess 3. By this means a greater bearingsnrface is given to swage 6 on the roll, and the angularity of said bearing-surface prevents said swage when held snugly in place from sliding or following around the roll.

It is apparent, then, that when the swage is in place in the recess 3 and key 10 is driven into key-seat 5 and the lips 11 ll engage channels 8 and 9 the swage and key being largest at their bases and being contained in a recess likewise largest in its base will only be wedged more firmly in place by any tendency toward being pulled out of said recess. The arrangement of angular bearing-surfaces for the base of said swage against the surface of the roll further prevents anylateral motion on the part of the swage when in position.

In case the wear on the bearing-surfaces on the swage and the roll-body results in a looseness in the parts, so causing lost motion, I remove the swage from the roll-body and plane off the bottom of the recess in the roll-body until a sharp angular bearing-surface is again obtained. I then cut out the bearing-surface of the swage to fit the new bearing-surface on the roll-body. This operation will result in 'wasworn 'o'utthe 'whol'croll would be throw away as useless,

finer steel, and th'e swage aloneof anexpensivegrade 'of'nietal. In case the swage became worn out another cou'ld be substituted body. The firmness and solidity' gained by finy in'v'ention by the novel 1 method of fixing hover arrangement of an an'gular'bottoih for the recess, againstwhich t'hes'wageishld iii-ml y, and my novel form of "key. I therefore gain all the "advantages of an integral pr'ocess of swagin'g is effected by d'rawi ng' the -blank on ""a 'niandrel flirough {Y the r'olhahd "when one pass has been tom pleted it isagai'n passed through in the same direction; and's'o setting the swage-farther into theroll-body, which will of course cause the sWaging-surface to become eccentric to the roll-body. I therefore turn the swage on a lathe to remove this eccentricity. A new channel 8 must be cut in the side'of the swage, as lipl-l on key; 10 will no longer register with the original channel 8 when the swa'ge is set farther into the roll-body. By this means I am enabled to maintain at all times the swage snugly on the roll-body. If,however,I placed the swage in a complete circle around the roll-body, I would be unable to take up the wear and prevent lost motion and a new swagewould have to be substituted. 1

'Among the many advantages attendant; upon the use of'rny invention in additionto'th'e; one above mentioned m'ay'be named economy in the use of material. 'Ifthe roll and swagje were cast integral, the whole construction would need t'o'be of a' fine and costlygradeofi steel, such as tool-steel, and it lfm the-swage In the use of m 'nwenucm I may make the body oftheroll' of any cheap grade of steel,such as open-hearth orBessevi ithout necessitating renewal "of the rollcasting 'rolland swage integrahare ained in castin g without'incurrin'gthe disadvantages abov'eenumerated. As iswellknown, the

on. My swages ohlysuri oun'dthe roll-bodies for a portion of theirperi 1neters,so that'wlien the blank has passed through thesWage's it 'may be quickly passed back between the plain surfaces of the rolls and"so beready to be-drawn back again through the swages when they have turned into position. The superiority of my improvement will thus be apparent.

I have described my invention minutely; but I donot-intend to limit-myself thereby, but claim, broadly 1. In swaging-rolls, a roll; a recess in said "roll having a flat bottom surface cut away at its extremities to form angular bearing-surfaces, and a swage adapted to'be seated in 1 said recess.

2. In swagi ng-rolls, a roll; a recess in said 'roll having a flatbottom surface cut away at its-extremities to form angular bearing-surfaces, and a s'wage;keyedin saidre'cess.

A. In'swa ing r0u a roll; a reces's in said run having 'a fl-at bottom' su rfacecur away at its" extremities worm-m a'ngular bearing-s11 rfacesfandaswa ge adapted to be fi'X'ed ins-aid i.s..,- -.--'.'.i,r

recess andhaymg e'xtremitlesadapted to eng'a'ge said bearing-surfaces.

'5. In swagin'g roll's, 'a'r'oll 'a recess in said roll having a flat bottom surface cutaway at 'its'exti'e'mities to form angl1far"bearing?surfaces; a s'wage seated in said "recess a key re'taihingsaid "swajge in "plate hahnels" on said s'wage and said roll,"ali'clpro'j ec'tio'i-r's on "saidkey"registeringwithsai-d'channels;

6. ln-swaging rcrls; aroll ;'-'a"recess insaid 1-011 having? ahatbottom-mrface cut awa at its extremitiesto fdrin angular hea ring-sh ri faces; aswa e adapted to 'be seated; in "said recess-(mu having-examines fitt'edto engage this'e'tnh 'd-aytf Jami-e00.

SAMUEL TR'EPHEWEY. 

